Hand drill or the like



c. BODMER HAND DRILL OR THE LIKE Filed sept. 1s, 192s May 5, 1925;

llla m u .vh

i Patented May V5, 19,25.

y UNITED STATES- IATENI oFFicE.

CHRISTIAN Bomann,- or New BRITAIN, ooiNNnorIour, assIeNon To THE STANLEY wenns, or Naw BRITAIN, Certainement, coerce-armaron CONNECTICUT.

IIAND. DRILL Application filed September To all whom t may concern: i

Be it. known that I, CHRISTIAN Bonanni, a citizen ot the- United States, `and a resident of New Britain, county of Hartford, State of Connecticut, haveV invented certain new and useful Improvements in a Hand Drill or the like, of which the *following*l is a specification.

The aim of the `presentl invention is to provide a hand drill or the like with means, having features of novelty and advantage, foroperatively `connecting the drill spindle, for exainple,iwith the operating member or driving gear in suoliv a manner that the spindle may be selectively driven atditl'erentspeeds, the spindle and driving gearcharacterized by its extreme simplicity andl economy in construction and the ease 1 and facility with which itmay be operated to effect dierentspeeds of the spindle or to lock the same against rotation. i

Other objects will be in part obvious and in part pointed out more kindetail heremafter. i

The invention accordinglyconsists in the `features of construction, combination of elements andarrangement of partsl which will be'exenipliiied in the construction hereinafter set forth, and the scope of the application lof which will be indicated in theappendedclaims.

In" the accompanying drawings, whereinl I have shown, yfor illustrative purposes only, one embodiment which the present inven" tion may take; Figure'i is an elevational view in section through the hand drill; n Fig. 2 is a view oit one'of the pinions asso-v ciated with'the drill spindle;` y

Fig. 3 is a partialf-sectional view taken substantially on line 3-3 of Fig. 1;

Fig. Il isa side elevational view ofthe collar or sleeve which carries tliefmeans for selectively connecting the spindle to the several pinions; and e Fig. iis a view similar' to Fig. l with parts broken away to show the internal construction. f

Referring to the drawings in detail, the

vertical drill has a frame provided with cross independon LIKE.. y

is, i923. semi No. s623143..`

ypiecesl or bearings tuin which is` journalled a drill spindle B carrying a chuck C for the drills lor the like. Securedto the upper end of the traine in any suitable manner is a handle D. rlhe spindle is driven by meansv of a driving gear E which may be provided with a handle F. In the present illustrativey disclosure, this gear E is journalled on a stud G extending laterally from thecentral cross piece a ot the frame. For the purpose ot steadying the gear E,` theremay be provided, ii` desired, an idler pinion H at the upper end oiE the frame.

ln accordance with the present invention,

l provide the gear E with two concentric rings of gear teeth 10 and 11 which respectively mesh Vwith bevel pinions 12 and 13 mounted on the drill spindle B. Positioned between the pinions 12 and lfis a collar or sleeve 14: secured to the spindle against,

pinions l2 and 13 against rotary` movementv relative to the sleeve 14 and the spindle B to which this sleeve is secured,` as above described. yThis means, in the present illustrative disclosure, includes a pairfof pinsL oneV pin 17 being adapted to connect the pinion 13 to the sleeve, and the other pin 18 eol being adapted to lconnect the pinion 12 to the sleeve. These pins are mounted for sliding movement in suitable longitudinal bores r19 and20, respectively, and are adapted to be operated or moved longitudinally by buttons 21 extending laterally through and beyond suitable slots 22 inthe sidesof the sleeve 14. For the purpose otholding the pins in' any position ot adjustment, and thus preventing their accidental engagement with or the inadvertent .withdrawal from the respective gears l12 and 13,' cach oi' the pins carries a-- spring 24: bearing against the sleeve. The face of each gear 12 and 13 bearing against the `sleeve 14 is providedy with a concentric ring of recesses Q5 in which the ends of the pins are adapted to be engaged. By providing a plurality ot such recesses in each pinion, engagement of the respective pins in these recesses may be very quickly had.

ri`lie manner in which my improved hand drill operates- Will be readily understood from the foregoing description. In the event that a drill ot larger size is to be employed, or a hole in a relatively hard piece of metal is to be formed, it is desirable to drive the chuck at a lesser speed and, in this instance, the pin 1S will be moved upwardly in the sleeve 141 so as to engage the pin in any one of the recesses ot the pinion 12, thus ixing this pinion to the spindle B. The driving gear E is then rotated to drive the spindle at the desired speed through the gear teeth 10 and the pinion 12. During this operation, the pin 17 is disengaget from the pinion 13. In the event that a smaller drill is to be employed, or the material ope 'ated on is not so hard, the pin 18 is disengaged from the pinion 12, and the pin 17 is engaged With the pinion 13 so as to fix this latter pinion tothe spindle, and then, when the driving gear E is rotated, the spindle is driven through the gear teeth 11 and the pinion 13 at a relatively faste-r speed. In some instances, it is desired to hold the spindle against rotation in the iframe as, for example, when the chuck is to be turned to grip or release the drill. In such case, each ot the pins 17 and 18 are engaged iv'th respective gears 13 and l2 so as to lock both oit these gears against rotation relative to the spindle. It will thus be obvious that, owing to the di florent pitch diameters ot the gear teeth 10 and 11, rotation of the spindle cannot ta-le place.

In other instances, it is desired to permit tree rotation of the spindle Without operation oit the gear E and the pinions with which this gear is in mesh as, for example, when, dnring the drilling operation, the drill cuts through the Work but the lower end of the hole has not been properly vtinished or cut out. In such a case, the vdri-ll jams, so to speak, and then it is oi advantage to grip the chuck C and turn the same, together vvith the drill, While holding them againstlongitndinal movement. In snch a case, with my improved construction, both of the pins 17 and 1S are Withdrawn into the sleeve so as to disengage both gears 12 and 13 and then the spindle may be rota-ted directly by hand Without turning the operating gears or pinions.

As. many changes could be made in the aboveconstruction and many apparently Widely dilterent embodiments ot this invention. could be made Without departing from thescope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawing shall he interpreted as illustrative and not in a limiting` sense.

It is also to be understood that the language used in the following claims is ictended to cover all of the generic and speciiic features of the invention herein cescribed and all statements et the scope of the invention which, as a matter of language, might be said-to tall therebetween.

I claim as my invention:

1. In a hand drill a trame, a spindle iournaled therein, and a speed changing device comprising a driving gear with two gearsets, one Within the other, a pair ot pinions loose on said spindle and meshing with the respective gear-sets, a collar positioned between said pinions and permanently secured to said spindle, a pin slidably mounted in said coll-ar and adapted to positively engage one of said pinions, and a second pin independent olf the first 'one slidably mounted in said collar and adapted to engage the other ot said pinions.

2. In a hand drill a trame, a spindle journaled therein, and a speed changing device comprising a driving gear with tivo gearsets, one Within the other, a pair of pinions loose on said spindle and meshing With the respective gear-sets, a collar positioned betiveen said pinions and permanently secured to said spindle, a pin slidably mounted in said collar and adapted to positively engage one ot said pinions, and a second pin independent o't the lirst one slidably mounted insaideol-lar and adapted to engage the other ot said pinions, said pins being independently operable and arranged so that either, neither, or both, may be engaged with the respective pinions, said pins having means lor moving the same.

3. In a hand drill, a trame, a spindle journaled therein., and a speed changing device including a pair of pinions freely mounted on said spindle and having in their opposed faces recesses, a driving gear having two gear sets, respectively meshing With said pinions, a collar carried by and secured to said spindle between said pinions and holding the same in spaced relation, a pin mounted in said collar tor sliding movement and adapted to engage in the recesses in one of said pinions, andy a second pin mounted in said collar independently ol said iirst mentioned pin and adapted to engage in the recesses of the other pinion, and means frictionally engaging said pins for holding the same in advanced and retracted positions, respectively.

4. In. a hand drill, a tramehaving a. pair of spaced spindle bearings, a spindle in said bearings, a collar on said spindle having a pair ot longitudinally extending bores, means tor permanently liXing said collar to said spindle, a pair of pinions loose on said spindle and held in place thereon between said collar and the respective bearings, the opposed faces of said pinions being rovidedy with recesses, a driving gear provi ed Wiih two gear sets respectivel' meshing with said pinions,v a pin lnounte in each bore and adapted to respectively and positively engage in the recesses of the `respectivek pinions, a button on each pin for moving the same 'inte and out of engagement with the respective pinions, and a spring carried by each pin and engaging said collar, said pins being independently operable.

" CHRISTIAN BODMER. 

